Improved machine for making car-springs



ALBERT HEBBARD. orl SPRINGFIELD, MASSACHUSETTS.

Letters Patent 1Y0.4 100,400, dated March 1, 1870.

' nvnnovnn'MAcHrNn FCR MAKING CAR-SPRINGS.

, `The Schedulerefefred to in these Letters Patent and making part of the tame To all whom 'it mag/concerti:

Be it known that 1,.,ALBER1 HEBBARD, of Springfield, inthecounty of Hampden, and State of Massai jcliusetts, have invented a new and useful Machine for Making Car-Springs; and I do hereby declare that the following is-a full, clear, and exact description thereof',

reference being had to the accompanying drawings making a part of this specification, and to the letters of reference marked thereon, in which- Y Figure 1, plate l is a plan view of myinvention;

Figure 2, plate 2,.is a side elevation; v y 'v f Figure' is a side view of aroll, with a right hand spiral groove; j

Figure 4 isa vertical transverse section of the guidev barand its socket, through line H I of tig. 2; and Figure 5 is alongitudinal section of the presser-roll, through line G of tig. 1. t Y Y My invention relates to a device forcmakng the ca'rj'Spring for which Letters lPatent were granted ine dated "March 13,1866; and consists of a roll which is tapered or smallest at the outer l end,'said rollbeing attached to a shaft resting in proper bearings, and the roll has a sinall projection or hook at its inner or largest end, and the shaft to which the roll is attached has a spiral groove made thereonc i t The guide-bar, having suitable. guiding-holes made at one end, slides to and fro longitudinally-in a. socket made `in a larger bar, andnear the inner end ot' the guide-bar are suitable holes, which are threaded, and through one of them is turned a screw, the inner end i of which is inserted `into thespiral groove, so that when a rotary motion `is given to the shaft having the spiral groove thereon the said screw is carried along in a longitudinal direction,and with it the guide-bar.

Another shaft is placed parallel to thetirst, and also resting in suitable bearings, and upon the outer end of this shaft is placed another roll, which is eccentric i with its said shaft; and the line of taper of this roll is parallel to the line of taper of the iirst roll, that is to say, the outer end of the second roll is larger than the. inner end, and the second roll is made to revolve upon its shaft, while the rst roll is permanent upon and only revolves `with its shaft. Y

That others skilled in the art may be'able to make and use my nvention,`I will proceed to describe its construction and the mode of its operation.

A A represent the beds or ways in which the shafts B. and Bfhave their bearings, and they are secured in their said bearings by means of the caps h and h', which are made fast bythe screws c and c'.

The shaft B' has the spiral groove F made thereon, and the roll G' is made permanent upon the shaft B',

andatthe base or inner end of the roll C is the prov jecting annular ange l, to which 4is secured in any suitable and proper manner the hook or projection e'. The roll C istapered, being smallest at its outer end.

To the shaft B is secured the roll C, the outer end of the shaft being made eccentric with its inain portion, and the roll G secured' thereon, as shown in fig. 5, so that said'roll may revolve freely upon its shaft.

By reference to iig. 5 it will be seen`that B is the shaft, G is the roll, in the outer end of which is a circular recess made, having ashoulder at n.

A disk or washer, n, fits the said recess, and the roll C being placed upon the shaft B', a screw, m, is turned into the threaded hole made in the end of the shaft B', throiigh the disk n, said disk having first beeninsert-ed in the recess in the end of the roll C. The roll O is largest at the outer end, and is tapered toward the inner end upon the same line of taper as the roll G.

A bar, D, is secured to the beds A bymeans of the screws d, and in the bar D is a longitudinal gropve or socket, shown more fully in iig. 4, in which socket fits properly the guide-bar D', having the part E, thereon,

Ain which are the holes o o.

Holes which have a screw-thread made therein are made in the guide-bar D' at i i, into one of which is turned the screw f, the end of which protrude's suiii ciently through the bar to enter the spiral groove F.

A longitudinal horizontal slot, s, is made along the bar D, in which moves longitudinally the screwj' when the machine is put in operation.

An arm or lever, a, is attached to the shaft B, by means of which said shaftl may be turned about half .way aroundin its bearings, throwing the eccentric roll C either near to or further from the roll C', and a rotary motion be given to the shaft B by power applied to the pulley N.

In practice the beds A A would be grooved, as shown in dot-ted lines in fig. 2, and the bar. D have correspondingly-shaped projections thereon, which would operate horizontallyin said grooves, the said bar being secured in Aany desired position by set-screws` or their-equivalents.

I will now describe the operation of my invention.

The guide D is moved in until the hole o in the part E is opposite the hook or projection e.

y The piece of steel of the proper size, of which the spring is to be made, is properly tapered at each end, and is heated to the desired degree, and one of the tapered ends is passed through the hole o, the extreme end of said tapered part resting between the projection c and the rollC'.

Power is then applied to the pulleyN and the shaft B' rotated, when the end of the screw f rides along in the. spiral groove I", carrying out Ythe guide-bar D' at n uniform rate of speed.

The red-hot steel is wound or coiled around the rotating roll G, while the holes o, or one of them, through which the steel is passing as itA is wound, carries the steel out toward the end of the roll O' until the end of the screw runs out of the end of the spiral groove, when by a partial revolution of the shaft B' the-tapered end of the steel is wound square.

When the tapered end of the steel is passed through the hole o and under the projection e', and the process of winding begins, the arm a is thrown over to the position shown in dotted lines in fig.], which also throws the eccentric roll C nearer to the roll C', as shown by the dotted lines also in gJ, and in that position the roll C presses against the steel which is being wound, keeping it close Ito said roll C', so that the spring when coiled shall be of the proper size.

When the operation of winding is completed the arm a is thrown hack to bring the eccentric presserrollback further from the rol-l C', so that the coiled spring mayY then be readily slipped o the tapered roll C.

The car-springs are made in nests, usually to the number of four, and each spring, commencing with the largest, is woundin an opposite direction; that is -to say, the largest spring is wound and the next smaller spring is lwound in the opposite direction by means of the roll and spiral groove shown in fig. 3, and of a size to just t within the first or largest spring. The next smaller spring is wound in the same direction as the rst `and is placed within the second, and the fourth is wound in the same direction as the second and placed within the third.

As al1 the springs are tapered from being wound upon the tapered roll'G', it is quite easy to place them one within the other; whereas if they were straight it would be a matter of some difficulty to place them one within the other and still have them tit properly. l

In winding upon the roll, and by the spiral groove shown in fig. 3, the shaft B and the bar D are made to change places, the bar D being placed where the shaft B is shown in fig. 1, but.upside down, so th'at the hole o shall be uppermost when it is ready for use.

Any number of holes t' may be made in the bar D', so that the screw f may be set for any desired length of spring, and any number of holes o may be made in the part E to get the best elevation of the steel for winding.

Having thus described my invention,

Wha-t I claim as new, and desirel to secure by Letters Patent, isl The tapered roll C', having the projection stop e' thereon, or its equivalent, incombination with the spiral groove F, the guide-bar D', and the presser-roll G, all constructed and operating substantially as described.

ALBERT HEBBARD.

Witnesses:

T. A. CURTIS, O. E. BuoKLAND. 

